2019-03-21 15:39:22 +00:00
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#!/usr/bin/env bash
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################################################################################
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# This tool fetches versions of build tools from the .TOOLVERSIONS
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# file in project root and calculates a single hash that represents
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# the combined versions of all the specified tools.
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################################################################################
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GIT_ROOT=$(git rev-parse --show-toplevel)
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toolversion="${GIT_ROOT}/scripts/toolversion"
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usage () {
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echo "Usage: gen-deps-hash [-b <base_hash>] -d <dep-name-1> [-d <dep-name-n>]" >&2
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echo
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echo "This script calculates a hash representing the required versions of the specified tools"
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exit 0
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}
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# some options parsing
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deps=()
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while getopts "hb:d:" opt; do
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case $opt in
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2019-03-21 16:56:22 +00:00
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b) base_hash="${base_hash}${OPTARG}";;
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2019-03-21 15:39:22 +00:00
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d)
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version=$($toolversion "$OPTARG")
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if [ $? -ne 0 ]; then
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echo "ERROR: $OPTARG not found in .TOOLVERSIONS"
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exit 1
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fi
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deps+=("$OPTARG $version")
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;;
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h) usage;;
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\?) echo "Invalid option: -$OPTARG" >&2; exit 1;;
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esac
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done
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if [ ${#deps[@]} -eq 0 ]; then
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echo "ERROR: No dependencies specified"
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echo
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usage
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fi
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IFS=$'\n' sorted_deps=($(sort <<<"${deps[*]}"))
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unset IFS
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hash=$(echo "${base_hash}${sorted_deps[@]}" | md5sum | cut -f1 -d" ")
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echo "${hash:0:8}"
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